Thanks to having a hometown builder-in-chief in the White House , New York has a once-in-a-lifetime opportunity to create an iconic landmark in the dingiest part of Midtown that would rival Rockefeller Center, Central Park or the Empire State Building. At the same time, the squalid underground rathole we call Penn Station would become an uplifting experience for the hundreds of thousands of downtrodden commuters who feel disrespected every day when they pass through. But the long-promised Penn